Self-threading sewing-machine needle



N0. 752,213. PATENTEDPEB. 16, 1904.

J. M. PARMER.

SELF THREADING SEWING MACHINE NEEDLE.

APPLICATION FILED DEG. 15. 1802.

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WITNESSES I IN VEN TOR.

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Patented February 16, 1904:

UNITED STATES PATENT OFFICE.

JULIUS M. FARMER, OF MILWAUKEE, WISCONSIN, ASSIGNOR OF PART TO JOHNVIERTHALER, JOSEPH DERFUS, JESSE E. MATTESON, EMERY L. TERRELL, V. A.GUDEX, D. P. REDD, CLARK S. MATTESON, AND CHARLES T. H. CLIFFORD, OFMILWAUKEE, WISCONSIN.

ASELF-THREADING SEWING-MACHINE. NEEDLE.

To all whom it may concern.-

Be it known that I, JULIUS M. FARMER, a citizen of the United States,residing at Mil- J waukee, county of Milwaukee, and State of Wisconsin,have invented new and useful Improvements in Self-Threading Sewing-Ma Mchine Needles, of which the following is a specification. My inventionrelates to improvements in selfthreading needles for sewingmachines, andthe construction of the same is explained by reference to theaccompanying drawings, in which M Figure 1 represents a plan or frontview of the needle. Fig. 2 is a side view. Fig. 3 is a transversesection drawn on line m w of Fig. 1, and Fig. 4 is an enlarged detailview of Fig. 2. Like parts are identified by the same referoence-letters throughout the several views.

A represents the body of the needle. B is the shank, by which it issecured in the machine. C is the point, and D is the eye.

My invention pertains more especially to 2 5 the peculiar constructionof the thread passage or slit E, through which the thread is drawn intothe eye, and also to the peculiar construction and arrangement of thedevice employed for automatically closing such slit after the thread hasbeen drawn into the eye.

The device for closing the thread-passage E comprises an elastic plateF, having a convex exterior surface conforming in shapeto the shape ofthe needle, while its inner surface is flattened to conform to theopposing surface Or of the needle, against which it bears. The plate Fis secured at its upper end to the needle by rivets G G, swaging, orother equivalent means, and its tension is such as to cause the 4 lowerend H to spring outwardly, whereby its angular bearingsurface I is heldfirmly against the corresponding angular bearing-surface J of theneedle. To prevent the liability of the threads entering the space Kbetween the plate F and the opposing wall G of the needle, the lower endof the bearing-plate is provided SPECIFICATIONfOrming part of LettersPatent No. 752,213, dated. February 16, 1904,

Application filedDecemher 15, 1902. Serial No. 135,279. (No model.)

with an inward-projecting shoulder L, which engages beneath the shoulderM of the needle.

The extreme lower end of the bearing-plate F is tapered upwardly andinwardly, forming a bevel-surface N, whereby with the downward movementof the needle the thread is caused to slip over the joint between thelower end of such plate and the angular bearing-surface J of the needlewithout liability of being caught. To facilitate threading the needle,the extreme upper end of the bearing J is tapered inwardly toward theopposing surface I of the bearing-plate F, whereby a small notch O isformed at such point for engagement with the thread preparatory todrawing it into the eye.

When threading the needle, the thread is pressed inwardly and downwardlyagainst the lower end of the bearing-plate, whereby the bearing-plate isforced inwardly toward the center of the needle, when the thread ispermitted to enter the eye at the notch O between the opposingbearing-surfaces I and J, when .said plate is thrown back by its ownelasticity A sewing-machine needle provided with a thread-receivingaperture, communicating from its exterior surface with the eye, thelower side of said aperture being beveled inwardly and downwardly towardthe point of the needle, and one side of its central portion flattenedfor the reception of an elastic bearing-plate in combination with anelastic bearing-plate rigidly afiixed at one end to the flattened sideof the needle; the lower end of said

